| http://www.w3.org/ns/prov#value | - than for a Space Shuttle launch.The HOTOL study was launched in 1986, but two years later the government refused to fund it further.In 1989 Bond helped form Reaction and designed its new concept craft, Skylon.* Designing a single stage to orbit propulsion system has been unsuccessful till now, largely due to the weight of the on-board oxidiser including liquid oxygen, needed by conventional rocket
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